The pole is up over some trees to take a ground shot for topo, so it isn't level, it's out a couple of tenths, your shot on the ground is actually 2-3 tenths (maybe even a foot) from the bottom of the rod, how is this actually effecting the accuracy of the topo?
The ground would have to be extremely steep for it to make any difference. Same with most topo features you are likely to encounter in the woods, even an electric box or fence line.
As for corners, different story.
Then there is the e-bubble..........B-)
Someone here suggested, a long time ago, that you fix a mirror to the pole so that you can see the bubble, when it's above your head.
Someone from New Zealand, I think.
Very good idea!
RADAR, post: 372345, member: 413 wrote: Someone here suggested, a long time ago, that you fix a mirror to the pole so that you can see the bubble, when it's above your head.Someone from New Zealand, I think.
Very good idea!
I remember a tip about using a disk from a hard drive inserted between sections of rod to read the bubble that is above the observer's head.
Maybe a shiny cd or dvd disk will do the same
Andy Bruner, post: 372340, member: 1123 wrote: I just thought you might like to see the high school that has your namesake.
Andy
Thanks for that. Are you located near there?
Brian that school is about three miles from my home. Both my children graduated form there. A lot of small colleges would love to have our facilities. The name is John McEachern High School, it is located in Powder Springs, Ga. a suburb of Atlanta.
Andy
Gregg Gaffney, post: 372237, member: 1111 wrote: last year one of my crews had a hell of a time running a traverse down through a 100 foot wide utility easements that was wildly overgrown.
Two days after they were done the utility company was out there doing maintenance and cleared the entire area.
Guys were not happy!!
Many surveyors do not realize that they can get a landscape company with a brush clearing tractor to "cut line" for them, and it will often cost less than it would to have a skilled survey crew cut it with bush hooks and chainsaws. This is especially true when what needs cutting is easily described or pointed out, and no surveyors need to be there to show the machine where to clear. For example, you could say, "just run a straight line just to the right of these poles, and keep going until the power line turns a corner". Check out this option whenever you have time to do so, and the situation seems right. Clearing along utility rights of way is especially problem free, because the utility folks do it themselves all the time, and no one will come up to ask what is going on, they just assume it is the regular clearing maintenance. There are certain situations where having the right landscaping company phone number can save you many dollars and hours of hard work.
RADAR, post: 372345, member: 413 wrote: Someone here suggested, a long time ago, that you fix a mirror to the pole so that you can see the bubble, when it's above your head.
Someone from New Zealand, I think.
Very good idea!
Right hemisphere , wrong continent, here was my way of reading the bubble on an above eye shot, fix the platter from an old hard disk drive to the bottom of the pole / receiver and shoot away.
I encourage everybody to "Get out of the Box". There are "More better ways" to do things, to quote an old colleague.
My mind dreams of stuff.
One of the things I wonder about, is IF I put a long pole, under a GPS receiver, and push it up through the trees, and I HANG a tubular plumb bob under it, (only hanging down 2 feet, or so) and the Tubuler plumb bob has a LASER inside it, and shines a DOT on the forest floor, and I keep adding range pole sections, and keep going up, then I eventually would need to know how much error is introduced, due to the GPS being at some amount off plumb, so that the Tubuler Plumb Bob can hang.....
Now, that I got the Javad... it is less "needy" of sky view, BUT the better sky view is, the faster things work anyway.
Dream on. there are good ideas, unplundered, still waiting.... for somebody to discover!
N
Here is a Link to another concept, "Go Low". I am not sure if this link will work, but I will try it.
Let me know.
If it does not work, I will upload the pics to this site.
N
Nate The Surveyor, post: 374379, member: 291 wrote: I encourage everybody to "Get out of the Box". There are "More better ways" to do things, to quote an old colleague.
My mind dreams of stuff.
One of the things I wonder about, is IF I put a long pole, under a GPS receiver, and push it up through the trees, and I HANG a tubular plumb bob under it, (only hanging down 2 feet, or so) and the Tubuler plumb bob has a LASER inside it, and shines a DOT on the forest floor, and I keep adding range pole sections, and keep going up, then I eventually would need to know how much error is introduced, due to the GPS being at some amount off plumb, so that the Tubuler Plumb Bob can hang.....
Now, that I got the Javad... it is less "needy" of sky view, BUT the better sky view is, the faster things work anyway.
Dream on. there are good ideas, unplundered, still waiting.... for somebody to discover!
N
you could add a plate to offset the antenna immediately from the pole sections and hang a plumb bob (or plumb barbara) straight to the forest floor from a hook or loop directly under the antenna. mm centring from any height.
